Grinding-machine.



J. PAVELKA.

GRINDING MACHINE.

APPLIOATION FILED MAY 15, 1913.

1,078,949. Patented Nov. 18, 1913.

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308MB PAV'EIJKA, 'OF ST. LOUIS, MISSOURI.

GRINDING-MACHINE.

Specification of Letters ratent.

Patented Nov. 18, 1913.

To all whom it may concern:

Be it known that I, Josurn Pavzmca, a citizen of the United States, residing. at St. Louis, Missouri, have invented a certain new and useful Improvement in Grinding- Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and uset-he same.

This invention relates to grinding machines of the type that are provided with a screw conveyor to feed the material through the machine.

One object of my invention is to provide a machine of the character described in which the material that is passed through same will be thoroughly disintegrated.

Another objectto provide a machine of the character described that can be -operated more easily than the machines now in general use.

Still another object is to provide a machine of the character described in which the devices that disint rate the material can be easily and quickly removed from operative position for purposes of cleaning, sharpening or renewal.

Other objects and'desirable features will be hereinafter pointed out.

Figure 1 of the drawings is a vertical sectional view of a .grinding machine constructed in accordance with my invention; Fig. 2 is an enlarged front elevation-a1 view partly broken away; and Fig. 3 is a detail sectional view taken on the line 8-3 of Fig. 2. a

Briefly stated, my invention consists in a casing that is ada d to contain the matea screw-conveyathat conveys said material from the rear end to the front end of said casing, means at the front end of said casing for thoroughly disintegrating said material, and a perforated plate through which the material is discharged from the machine.

Referring to the drawings whichiilustrate the preferred form 'of'my invention, A designates a casing that is provided with a hopper 1 adjacent-there end thereof, and B designates ahori'ziontally disposed screw conveyer that is rotatably mounted in said casing. The conveyor B is supported at its rear end by meansof a shaft 2 that passes through the rear wall of the casing A and to which may be attached any suit able operating mechanism, not shown, and

at its opposite end by means of a stub-shaft -3 that IS journaled in a sleeve 4, said sleeve being in turn supported by a perforated plate 5 that is arranged in the forward end of said casing.

As shown in the drawings, the conveyor B is of smaller diameter throughout thantbe inside diameter of the casing A so that an opening or slot 6 is formed at the front end of the machine between said conveyer and easing through which the material passes, and an annular shoulder -7 that lies in the same plane as the front face 8 of the conveyei- B is formed on said casing for pmposes hereinafter appearing.

The means herein shown for disintegrating the material that is conveyed to the front end of the machine consists of a plurality of rcvoluble cutting devices C that are mounted on the front face of the conveyer B and which are arra n ed between said face and the perforated plate 5, each of said cut-ting devices comprising a it of disks '9Vand 10 that are'secured to a b 11'. The hub 11 is provided-with is. non circular bore that cooperates witha correspondingly-shaped extension 12 of a short shaft 13 that is provided on its opposite end with a pinion 14 that is arranged in a recess 15 formed in the front end of the conveyor B. The pinion 14 meshes with a stationary gear-wheel 16 formed integral with the sleeve 4 previously mentioned, and a cover-plate 17 is arranged in the recess 15 flush with the face 8 of the conveyer B so as to protect said gears from the material being passed through the machine. By rotating the conveyer B in the direction of the arrow a in 2, the cutting devices C will be carried-in a circular path about the axis of said conveyer, and will also revolve about their own axes because their operating pinions engage the gear 18, which -10).

is held stationary by means of the noncircular and 18 of the sleeve 1 that co6p-- C bear against the front face 8 of the conveyer B and the annular shoulder 7 ofthe casing A, and the disks 10 bear against the perforated plate 5, said disks 10 being preferably concave as shown so that they will be practically self-sharpening. I prefer to provide the pinions 14 with anti-friction devices in order to reduce the labor of operating said pinions, and to this end I provide each of said piiiions witha ball-bearing 22 on the inner end thereof totake care of the end thrusts due to the action .of

I the conveyer B, and aball-bearing 23 at 3 the front end thereof to take care of the side thrusts of said pinions. The conveyer B is also provided at its rear end with a thrust bearing 24, and a hole25 is provided in the sleeve 4 for lubricating the .short' shaft 3 that supports the front end of the conveyer B In operating my machine, the material to when the conveyer B is -rotated,the devices C will be carried around and exert a shearing action on the meat asit is being forced through said opening. The concave disks on the devices C bear against the perforated plate 5 so as to shear the meat 21. second time before it is discharged from the machine. This shearing action is increased by' reason of the fact that the 'devices C are caused to rotate about their own axes by means of the inions 14' to which they are connected mes in with the stationary gear 16. It will thus eseen that the meat being forced through-the slot 6 is acted on by a constantly changing cutting edge.

To take the machine apart for purposes of cleaning, .etc. the cap 20 is unscrewed and removed, when the perforated plate 5 may be drawn out. The cutting devices C being merely slid onto the non-circular end of the shaft 13 may be readily disengaged therefrom, and the conveyer B may be then slid out forwardly. The short shaft 3 will be kept lubricated by themeat fat and juices that enter the hole 25 in the sleeve 4.; Because of the fact that the meat is thoroughly disintegrated before being discharged through the-perforated plate5, the operation of the machine will be'rendered easy, and the action of the devices C will absolutely prevent the dischargefrom the machine of any long piecesof uncut tendons or tough ristle.

From t e foregoing it will be seen that I cient, that on account of the action of the I disintegrating devices 0 and the disposition 'of suitable anti-friction devices, is easy to operate, is easy'to' assemble, and by having the operating mechanism for-the devig es C inclosed, they are protected from foreign matter and injury.

I am aware that minor changes may be 'made in the construction offlmy' machine without departingfromthe spirit'o f my invention. Having thus described my invention, what I claim as new and desire to secure by Let ters Patentis: 1. In a grinding machine, a screw conveyer for forcing the material to be ground from the inlet to the discharge end of said machine, and revoluble cutting disks mounted on the discharge end of said conveyer and ihavinIg shearing engagement therewith.

a grinding machine, ascrew conveyer for feeding material to be ground fromthe inlet to the discharge end of the machine, and circular disintegrating devices arranged in the discharge end of saidmachine and having shearing engagement therewith, and which are adapted to revolve about the axis of said conveyer and also about their own axes, the direction of 'rota tion of said conveyer and said disintegrating devices being the same.

In a grinding machine, a rotatably inoiintedmember that conveys the material to be ground from the inlet to the discharge end of the machine, and revoluble spoolshaped cutting devices mounted on the discharge end of said member, said cuttingdevices beingso arranged that they'will r0- tate in the same direction as said member.

4. In a grinding machine, a perforated discharge plate, a conveyor for conveying material to said discharge plate, and a plurality of disintegrating devices arranged between the end of said conveyer and said plate, each of said devices-comprising a pair of circular knives, one of said knives bearing a ainst the end of said conveyer and the ot er bearing against said plate.

5. In a grinding machine, a rotatable coiiveyer provided with asupporting shaft at the discharge end thereof, a gear-wheel loosely mounted on said shaft, a plurality of pinions provided with short shaftszthat are mounted in the discharge end ofsaid conveyer andthat mesh with said gear-wheel,

cutting devices that are connected to said short shafts, and a housing that completely covers said gear wheel and pinions.

6. In a grinding machine, a rotatable conveyer provided with a supporting shaft at loosely mounted on said shaft, means for holding said gear-wheel stationary,-a plurality of pinions provided with short shafts the discharge 7 end thereof, a gear-wheel that are mounted in the discharge end of said conveyer and that mesh with said gearwheel, cutting devices that are connected to said short shafts, and a housing that completely covers said gear wheel and inions.

7. In a grinding machine, a rotata le conveyer that is provided in its discharge end with a recess, a supporting shaft on said discharge end, a ar-wheel loosely mounted on said shaft an arranged in said recess, a plurality of pinions arranged in said recess that mesh with said gear, and revoluble spool-shaped cutting devices operatively connected to said pinions.

8. In a grinding machine, a rotatable conveyer that is provided in its discharge end with a recess, a supporting shaft on said discharge end, a gear-wheel loosely mounted on said shaft and arranged in said recess, a plurality of pinions arranged in said recess that mesh with said gear, a plurality of cutting devices connected to said inions, and a cover plate that incloses said gear and inions in said recess.

9. n a grinding machine, a rotatable conveyer provided with a supporting shaft at the discharge end thereo a gear-wheel loosely mounted on said shaft, means for holding said gear-wheel stationary, a plurality of pinions rovided with short shafts that are mount in the discharge end of said conveyer and that mesh with said gearwheel a plurality of cutting devices connected to said pinions, and anti-friction devices that cotiperate with said pinions.

10. In a grindin machine, a plurality of revoluble cutters t at are arranged in the same vertical plane, each of said cutters comprising a pair of cutting disks, and means for causing said cutters to rotate axially whenever they are revolved about their center of motion.

11. In a grinding machine, a rotatable conveyer, a stationar gear-wheel mounted in the discharge en of said conveyer, a plurality of cutting devices arranged in the discharge end of said conveyer that are provided with pinions that mesh with said stationary ear-wheel, and a housing that incloses sai gear wheel and pinions.

12. In a grinding machine, a casing, a conveyer rotatably mounted in said casing in such a manner that a circular space is left between the conveyer and the wall of the casing at the dischar e end of the conveyer, and a plurality o revoluble cutting disks that lay over said s ace and are adapted to travel around sai space whenever said conveyer is rotated.

13. In a grindin machine, 'a casing that is provided at its ischarge end with a perforated discharge plate, a conveyer arranged in said casing, an annular shoulder formed in said casing in alinement with the dischar e end of said conveyer, and a plurality of disintegrating devices that are mounted on the discharge end of said conveyer, each of said devices comprising a substantially fiat cutting disk that coiiperates with the discharge end of said conveyer and with said shoulder, a concave cuttin disk that cooperates with said perforate discharge laltie, and a hub portion that unites said 14. In a grinding machine, a screw conveyer that is provided at its discharge end with a supporting shaft, a gear wheel mounted on said shaft and havin an elongated hub whose end is non-circu er, a stationary perforated plate arranged in the discharge and of the machine and having a non-circular opening therein that cooperates with the non-circular end of said hub, and a plurality of revoluble cutting devices that are provided with pinions that mesh with said gear wheel and which are arranged between the discharge end of said conveyer and said perforated plate.

In testimony whereof I hereunto afiix my si nature in the presence of two witnesses, this twelfth day of May 1913.

JOSEPH PAVELKA. 

